DEQ Monitoring Sites

National Ambient Air Quality Standards

The Clean Air Act requires EPA to set ambient air quality standards for pollutants considered harmful to public health and the environment. The primary standards provide public health protection and the secondary standards provide public welfare protection against decreased visibility and damage to crops, vegetation, and buildings.

The NAAQS define the maximum permissible concentrations
for criteria pollutants. Click on the pollutant name for the relevant DEQ factsheet.